间歇曝气连续流反应器同步硝化反硝化除磷
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摘要
采用连续流反应器处理生活污水,保持厌氧段格室为3格,将缺氧段格室从2格减少至0格,好氧段格室由5格逐渐增加至7格,Run1时对好氧段格室采用连续曝气,Run2～Run4时采用间歇曝气.曝/停比分别为:40 min/20 min、40 min/30min、40 min/40 min,硝化液回流比从150%逐渐减少至0%. Run4时,平均进水COD、NH+4-N、TN、PO_4~(3-)-P浓度分别为259. 34、60. 26、64. 42、6. 10 mg·L-1,出水COD、NH+4-N、TN、PO_4~(3-)-P分别为26. 40、1. 03、5. 84、0. 30 mg·L-1.反应器对氮素的去除量从Run1时的192. 30 mg·h-1逐渐增加至Run4时的244. 00 mg·h-1,相应地去除率从65. 40%逐渐增大至95. 30%;从Run1～Run4,反硝化聚磷菌和聚磷菌的活性分别从36. 05%和38. 20%增大至140. 50%和133. 40%;通过间歇曝气在连续流反应器中实现了同步硝化反硝化除磷脱氮,为污水处理厂提标改造提供参考.
A continuous flow reactor( TCFR) with 10 compartments was used to treat domestic sewage. The anaerobic compartments of TCFR were kept at 3. The anoxic compartments of TCFR were reduced from 2 to 0. Therefore,the aerobic compartments of TCFR were increased gradually from 5 to 7. The aerobic compartments were set to continual aeration in Run1 and intermittent aeration from Run2 to Run4. The aeration/non-aeration ratios were 40 min/20 min,40 min/30 min,and 40 min/40 min,respectively. The nitrification liquid reflux ratios were reduced gradually from 150% to 0%. When the average influent concentrations of COD,NH+4-N,TN,and PO_4~(3-)-P were 259. 34,60. 26,64. 42,and 6. 10 mg·L-1,respectively,the corresponding effluent concentrations were 26. 40,1. 03,5. 84,and 0. 3 mg·L-1,respectively in Run4. The nitrogen removal amounts increased gradually from 192. 30 mg·h-1 in Run1 to244. 00 mg·h-1 in Run4,and the corresponding removal rates increased from 65. 40% to 95. 30%. The activity of denitrifying phosphorus accumulating organisms( DPAOs) and phosphorus accumulating organisms( PAOs) increased from 36. 05% and 38. 20%in Run1 to 140. 50% and 133. 40% in Run4,respectively. Simultaneous nitrification and denitrifying phosphorus removal was achieved in TCFR by adopting intermittent aeration,which provided a reference for the reformation of sewage treatment plants.
A continuous flow reactor( TCFR) with 10 compartments was used to treat domestic sewage. The anaerobic compartments of TCFR were kept at 3. The anoxic compartments of TCFR were reduced from 2 to 0. Therefore,the aerobic compartments of TCFR were increased gradually from 5 to 7. The aerobic compartments were set to continual aeration in Run1 and intermittent aeration from Run2 to Run4. The aeration/non-aeration ratios were 40 min/20 min,40 min/30 min,and 40 min/40 min,respectively. The nitrification liquid reflux ratios were reduced gradually from 150% to 0%. When the average influent concentrations of COD,NH+4-N,TN,and PO_4~(3-)-P were 259. 34,60. 26,64. 42,and 6. 10 mg·L-1,respectively,the corresponding effluent concentrations were 26. 40,1. 03,5. 84,and 0. 3 mg·L-1,respectively in Run4. The nitrogen removal amounts increased gradually from 192. 30 mg·h-1 in Run1 to244. 00 mg·h-1 in Run4,and the corresponding removal rates increased from 65. 40% to 95. 30%. The activity of denitrifying phosphorus accumulating organisms( DPAOs) and phosphorus accumulating organisms( PAOs) increased from 36. 05% and 38. 20%in Run1 to 140. 50% and 133. 40% in Run4,respectively. Simultaneous nitrification and denitrifying phosphorus removal was achieved in TCFR by adopting intermittent aeration,which provided a reference for the reformation of sewage treatment plants.
引文
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[12]方茜,张朝升,杜馨,等.同时硝化/反硝化除磷过程的控制策略研究[J].中国给水排水,2009,25(11):59-62.Fang Q, Zhang C S, Du X, et al. Control strategy for simultaneous nitrification/denitrifying phosphorus removal process[J]. China Water&Wastewater,2009,25(11):59-62.
[13] APHA. Standard methods for the examination of water and wastewater(21st ed.)[M]. Washington,DC:American Public Health Association,2005.
[14] Fan J L,Zhang J,Guo W S,et al. Enhanced long-term organics and nitrogen removal and associated microbial community in intermittently aerated subsurface flow constructed wetlands[J].Bioresource Technology,2016,214:871-875.
[15] Pan J,Fei H X,Song S Y,et al. Effects of intermittent aeration on pollutants removal in subsurface wastewater infiltration system[J]. Bioresource Technology,2015,191:327-331.
[16]张玲,彭党聪,常蝶.温度对聚磷菌活性及基质竞争的影响[J].环境科学,2017,38(6):2429-2434.Zhang L,Peng D C,Chang D. Effect of temperature on PAO activity and substrate competition[J]. Environmental Science,2017,38(6):2429-2434.
[17]陈永志,彭永臻,王建华,等.内循环对A2/O-曝气生物滤池工艺脱氮除磷特性影响[J].环境科学,2011,32(1):193-198.Chen Y Z,Peng Y Z,Wang J H,et al. Effect of internal recycle ratio on nitrogen and phosphorus removal characteristics in A2/OBAF process[J]. Environmental Science,2011,32(1):193-198.
[18]罗亚红,李冬,鲍林林,等.长泥龄改良A2/O工艺的短程硝化反硝化除磷[J].化工学报,2014,65(12):4985-4996.Luo Y H,Li D,Bao L L,et al. Shortcut nitrification and denitrifying phosphorus removal in improved A2/O technique with long SRT[J]. CIESC Journal,2014,65(12):4985-4996.
[19]阳素攀.同时硝化/反硝化除磷系统处理低碳城市污水的过程控制及机理研究[D].广州:广州大学,2012.
[20]黄剑明,赵智超,郑隆举,等.低温下A2/O-BAF反硝化除磷脱氮特性[J].环境科学,2018,39(10):4621-4627.Huang J M,Zhao Z C,Zheng L J,et al. Characteristics of denitrifying phosphorus removal of A2/O-BAF at low temperature[J]. Environmental Science,2018,39(10):4621-4627.
[21]刘立,汤兵,黄绍松,等.反硝化聚磷菌快速富集、培养及其荧光原位杂交技术鉴别[J].环境科学,2013,34(7):2869-2875.Liu L, Tang B, Huang S S, et al. Rapid enrichment and cultivation of denitrifying phosphate-removal bacteria and its identification by fluorescence in situ hybridization technology[J].Environmental Science,2013,34(7):2869-2875.
[22]樊晓梅.反硝化聚磷菌吸磷能力和生长特性研究[J].沈阳建筑大学学报(自然科学版),2017,33(1):119-126.Fan X M. Research on the phosphorus absorption ability and growth characteristics of denitrifying phosphorus-accumulating organisms[J]. Journal of Shenyang Jianzhu University(Natural Science),2017,33(1):119-126.
[23]南彦斌,彭永臻,曾立云,等.分段进水对改良A2/O-BAF双污泥系统反硝化除磷脱氮的影响[J].环境科学,2018,39(4):1704-1712.Nan Y B,Peng Y J,Zeng L Y,et al. Effect of step feed on denitrifying phosphorus and nitrate removal in a modification of the two sludge A2/O-BAF system[J]. Environmental Science,2018,39(4):1704-1712.
[24]方茜,张朝升,杜馨.间歇曝气模式对同步硝化反硝化稳定性的影响[J].环境科学学报,2009,29(7):1411-1418.Fang Q,Zhang C S,Du X. Influence of intermittent aeration on the stability of simultaneous nitrification and denitrification[J].Acta Scientiae Circumstantiae,2009,29(7):1411-1418.
[25]吕冬梅,彭永臻,赵伟华,等. A2O-BAF工艺反硝化聚磷效果的影响因素[J].中国环境科学,2015,35(11):3266-3274.LüD M,Peng Y Z,Zhao W H,et al. Factors influencing the denitrifying phosphorus removal efficiency of A2O-BAF process[J]. China Environmental Science,2015,35(11):3266-3274.
[26]范军辉,郝瑞霞,朱晓霞,等.温度对SCSC-S/Fe复合系统脱氮除磷及微生物群落特性的影响[J].环境科学,2017,38(5):2012-2020.Fan J H,Hao R X,Zhu X X,et al. Effects of temperature on the characteristics of nitrogen and phosphorus removal and microbial community in SCSC-S/Fe[J]. Environmental Science,2017,38(5):2012-2020.
[27]肖剑波,卢培利,曾善文,等.基于氧利用速率表征好氧吸磷过程特性[J].环境工程学报,2016,10(10):5479-5484.Xiao J B,Lu P L,Zeng S W,et al. Characteristic of aerobic phosphorus uptake process based on OUR[J]. Chinese Journal of Environmental Engineering,2016,10(10):5479-5484.
[28]马娟,宋璐,俞小军,等.超低溶解氧条件下的EBPR系统除磷性能[J].环境科学,2016,37(8):3128-3134.Ma J,Song L,Yu X J,et al. Phosphorus removal performance in EBPR system under extra-low dissolved oxygen condition[J].Environmental Science,2016,37(8):3128-3134.
[2]郭玉梅,吴毅辉,郭昉,等.某污水厂A2O和倒置A2O工艺脱氮除磷性能分析[J].环境工程学报,2015,9(5):2185-2190.Guo Y M,Wu Y H,Guo F,et al. Analysis of nitrogen and phosphorus removal in A2O and inverted A2O processes in a wastewater treatment plant[J]. Chinese Journal of Environmental Engineering,2015,9(5):2185-2190.
[3]赵卫兵,陈天虎,张强,等.溶解氧对Biolak型A2O工艺脱氮除磷性能的影响[J].环境科学学报,2014,34(11):2754-2758.Zhao W B,Chen T F,Zhang Q,et al. Effect of dissolved oxygen on removal of nitrogen and phosphorus in Biolak/A2O process[J]. Acta Scientiae Circumstantiae,2014,34(11):2754-2758.
[4]王伟,彭永臻,殷芳芳,等.改进分段进水A/O生物脱氮工艺强化生物除磷[J].环境科学,2009,30(10):2968-2974.Wang W,Peng Y Z,Yin F F,et al. Modified Step-feed A/O biological nitrogen removal process for enhanced phosphorus removal[J]. Environmental Science,2009,30(10):2968-2974.
[5]李曈,郝瑞霞,刘峰,等. A/A/O工艺脱氮除磷运行效果分析[J].环境工程学报,2011,5(8):1729-1734.Li T,Hao R X,Liu F,et al. Analysis on running effect for biological nitrogen and phosphorus removal of A/A/O technology[J]. Chinese Journal of Environmental Engineering,2011,5(8):1729-1734.
[6]乔宏儒,孙力平,吴振华,等.倒置A2/O工艺和UCT工艺脱氮除磷效能比较[J].水处理技术,2015,41(12):118-121.Qiao H R,Sun L P,Wu Z H,et al. The comparison of nitrogen and phosphorus removal between inverted A2/O process and UCT process[J]. Technology of Water Treatment,2015,41(12):118-121.
[7]王慰,王淑莹,张琼,等.后置缺氧UCT分段进水工艺处理低C/N城市污水[J].中国环境科学,2016,36(7):1997-2005.Wang W,Wang S Y,Zhang Q,et al. Post-anoxic UCT step-feed process in treating municipal wastwater with low C/N ratios[J].China Environmental Science,2016,36(7):1997-2005.
[8]沈连峰,胡宗泰,王婷,等.两种脱氮除磷污水处理工艺的效果分析[J].中国给水排水,2011,27(12):99-101.Shen L F,Hu Z T,Wang T,et al. Efficiency analysis of two sewage treatment processes for nitrogen and phosphorus removal[J]. China Water&Wastewater,2011,27(12):99-101.
[9]余鸿婷,李敏.反硝化聚磷菌的脱氮除磷机制及其在废水处理中的应用[J].微生物学报,2015,55(3):264-272.Yu H T, Li M. Denitrifying and phosphorus accumulating mechanisms of denitrifying phosphorus accumulating organisms(DPAOs)for wastewater treatment-a review[J]. Acta Microbiologica Sinica,2015,55(3):264-272.
[10]林金銮,张可方,方茜,等.碳源浓度对同步硝化反硝化协同除磷影响研究[J].环境科学与技术,2009,32(9):5-8.Lin J L, Zhang K F, Fang Q, et al. Effect of carbon concentration on simultaneous nitrification, denitrification and phosphorus removal in SBR[J]. Environmental Science&Technology,2009,32(9):5-8.
[11]阳素攀,方茜,林曼婷,等.同时硝化/反硝化除磷工艺的脱氮除磷效能[J].环境科学与技术,2012,35(6):106-109.Yang S P,Fang Q,Lin M T,et al. Performance of simultaneous nitrification/denitrifying phosphorus removal process[J].Environmental Science&Technology,2012,35(6):106-109.
[12]方茜,张朝升,杜馨,等.同时硝化/反硝化除磷过程的控制策略研究[J].中国给水排水,2009,25(11):59-62.Fang Q, Zhang C S, Du X, et al. Control strategy for simultaneous nitrification/denitrifying phosphorus removal process[J]. China Water&Wastewater,2009,25(11):59-62.
[13] APHA. Standard methods for the examination of water and wastewater(21st ed.)[M]. Washington,DC:American Public Health Association,2005.
[14] Fan J L,Zhang J,Guo W S,et al. Enhanced long-term organics and nitrogen removal and associated microbial community in intermittently aerated subsurface flow constructed wetlands[J].Bioresource Technology,2016,214:871-875.
[15] Pan J,Fei H X,Song S Y,et al. Effects of intermittent aeration on pollutants removal in subsurface wastewater infiltration system[J]. Bioresource Technology,2015,191:327-331.
[16]张玲,彭党聪,常蝶.温度对聚磷菌活性及基质竞争的影响[J].环境科学,2017,38(6):2429-2434.Zhang L,Peng D C,Chang D. Effect of temperature on PAO activity and substrate competition[J]. Environmental Science,2017,38(6):2429-2434.
[17]陈永志,彭永臻,王建华,等.内循环对A2/O-曝气生物滤池工艺脱氮除磷特性影响[J].环境科学,2011,32(1):193-198.Chen Y Z,Peng Y Z,Wang J H,et al. Effect of internal recycle ratio on nitrogen and phosphorus removal characteristics in A2/OBAF process[J]. Environmental Science,2011,32(1):193-198.
[18]罗亚红,李冬,鲍林林,等.长泥龄改良A2/O工艺的短程硝化反硝化除磷[J].化工学报,2014,65(12):4985-4996.Luo Y H,Li D,Bao L L,et al. Shortcut nitrification and denitrifying phosphorus removal in improved A2/O technique with long SRT[J]. CIESC Journal,2014,65(12):4985-4996.
[19]阳素攀.同时硝化/反硝化除磷系统处理低碳城市污水的过程控制及机理研究[D].广州:广州大学,2012.
[20]黄剑明,赵智超,郑隆举,等.低温下A2/O-BAF反硝化除磷脱氮特性[J].环境科学,2018,39(10):4621-4627.Huang J M,Zhao Z C,Zheng L J,et al. Characteristics of denitrifying phosphorus removal of A2/O-BAF at low temperature[J]. Environmental Science,2018,39(10):4621-4627.
[21]刘立,汤兵,黄绍松,等.反硝化聚磷菌快速富集、培养及其荧光原位杂交技术鉴别[J].环境科学,2013,34(7):2869-2875.Liu L, Tang B, Huang S S, et al. Rapid enrichment and cultivation of denitrifying phosphate-removal bacteria and its identification by fluorescence in situ hybridization technology[J].Environmental Science,2013,34(7):2869-2875.
[22]樊晓梅.反硝化聚磷菌吸磷能力和生长特性研究[J].沈阳建筑大学学报(自然科学版),2017,33(1):119-126.Fan X M. Research on the phosphorus absorption ability and growth characteristics of denitrifying phosphorus-accumulating organisms[J]. Journal of Shenyang Jianzhu University(Natural Science),2017,33(1):119-126.
[23]南彦斌,彭永臻,曾立云,等.分段进水对改良A2/O-BAF双污泥系统反硝化除磷脱氮的影响[J].环境科学,2018,39(4):1704-1712.Nan Y B,Peng Y J,Zeng L Y,et al. Effect of step feed on denitrifying phosphorus and nitrate removal in a modification of the two sludge A2/O-BAF system[J]. Environmental Science,2018,39(4):1704-1712.
[24]方茜,张朝升,杜馨.间歇曝气模式对同步硝化反硝化稳定性的影响[J].环境科学学报,2009,29(7):1411-1418.Fang Q,Zhang C S,Du X. Influence of intermittent aeration on the stability of simultaneous nitrification and denitrification[J].Acta Scientiae Circumstantiae,2009,29(7):1411-1418.
[25]吕冬梅,彭永臻,赵伟华,等. A2O-BAF工艺反硝化聚磷效果的影响因素[J].中国环境科学,2015,35(11):3266-3274.LüD M,Peng Y Z,Zhao W H,et al. Factors influencing the denitrifying phosphorus removal efficiency of A2O-BAF process[J]. China Environmental Science,2015,35(11):3266-3274.
[26]范军辉,郝瑞霞,朱晓霞,等.温度对SCSC-S/Fe复合系统脱氮除磷及微生物群落特性的影响[J].环境科学,2017,38(5):2012-2020.Fan J H,Hao R X,Zhu X X,et al. Effects of temperature on the characteristics of nitrogen and phosphorus removal and microbial community in SCSC-S/Fe[J]. Environmental Science,2017,38(5):2012-2020.
[27]肖剑波,卢培利,曾善文,等.基于氧利用速率表征好氧吸磷过程特性[J].环境工程学报,2016,10(10):5479-5484.Xiao J B,Lu P L,Zeng S W,et al. Characteristic of aerobic phosphorus uptake process based on OUR[J]. Chinese Journal of Environmental Engineering,2016,10(10):5479-5484.
[28]马娟,宋璐,俞小军,等.超低溶解氧条件下的EBPR系统除磷性能[J].环境科学,2016,37(8):3128-3134.Ma J,Song L,Yu X J,et al. Phosphorus removal performance in EBPR system under extra-low dissolved oxygen condition[J].Environmental Science,2016,37(8):3128-3134.